|
|
|
| An efficient method for iron ore sintering with high-bed layer: double-layer sintering |
| Qiang Zhong1, Hui-bo Liu1, Liang-ping Xu1, Xin Zhang1, Ming-jun Rao1, Zhi-wei Peng1, Guang-hui Li1, Tao Jiang1 |
| 1 School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China |
|
|
|
|
Abstract Poor permeability and low sintering productivity restrict the development of high-bed sintering. An efficient method of the double-layer sintering process (DLSP) was proposed to achieve high-bed sintering and solve the aforementioned problems. Theoretical calculation and sintering pot experiments were implemented to investigate the double-layer sintering process. Traditional sintering process and DLSP were compared in terms of sintering indices, metallurgical properties and morphology characterization. Under the condition of traditional sintering process, DLSP successfully realized fast velocity and highly productive sintering of 1000-mm high bed. After the sintering bed is charged and ignited twice, the air permeability of the bed has been greatly improved. Sintering time is shortened significantly by simultaneous sintering of the upper and lower feed layers. Under the condition of bed height proportion of 350/650 mm and pre-sintering time of 20 min, the yield, tumbler strength, productivity and solid fuel consumption are 69.96%, 65.87%, 1.71 t (m2 h)-1 and 56.71 kg/t, respectively. Magnetite, hematite, calcium ferrite and complex calcium ferrite are the main phases of DLSP products. The metallurgical properties of DSLP products meet the requirement of ironmaking. It indicates that DLSP is an effective method to solve the disadvantages of bad permeability and low sintering productivity in high-bed sintering.
|
|
|
|
|
|
| Cite this article: |
|
Qiang Zhong,Hui-bo Liu,Liang-ping Xu, et al. An efficient method for iron ore sintering with high-bed layer: double-layer sintering[J]. Journal of Iron and Steel Research International, 2021, 28(11): 1366-1374.
|
|
|
|
| [1] |
Sheng-li Wu, Xiao-bo Zhai, Li-xin Su, Xu-dong Ma. Ore-blending optimization for Canadian iron concentrate during iron ore sintering based on high-temperature characteristics of fines and nuclei[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(7): 755-769. |
| [2] |
Xiao-hui Fan, Yan-nan Wang, Min Gan, Zhi-yun Ji, Yang Zhou, Xu-ling Chen. Thermodynamic analysis and reaction behaviors of alkali metal elements during iron ore sintering[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(6): 558-566. |
| [3] |
Hong-ming Long, ? Qi Shi ? Hong-liang Zhang ? Ru-fei Wei ? Tie-jun Chun ? Jia-xin Li. Application status and comparison of dioxin removal technologies for iron ore sintering process[J]. , 2018, 25(4): 357-365. |
| [4] |
Zhi-yuan Yu,,*,Xiao-hui Fan,Min Gan,Xu-ling Chen. Effect of Ca-Fe oxides additives on NOx reduction in iron ore sintering[J]. , 2017, 24(12): 1184-1189. |
| [5] |
Li-shun YUAN,Xiao-hui FAN,Min GAN,Gui-ming YANG,Yi WANG. Structure Model of Granules for Sintering Mixtures[J]. Chinese Journal of Iron and Steel, 2014, 21(10): 905-909. |
| [6] |
ZHANG Jun,GUO Xing-min,HUANG Xue-jun. Effects of Temperature and Atmosphere on Sintering Process of Iron Ores[J]. Chinese Journal of Iron and Steel, 2012, 19(10): 1-6. |
|
|
|
|
2021, Vol. 28 
